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ISSN Online: 2377-424X

ISBN Print: 0-89116-299-2

International Heat Transfer Conference 7
September, 6-10, 1982, Munich, Germany

PERFORMANCE OF LOW FIN TUBING IN ASPHALT SERVICE

Get access (open in a dialog) DOI: 10.1615/IHTC7.2580
pages 409-414

要約

Low fin tubing has found successful application in many services ranging the gamut from condensing to sensible heat transfer to boiling. However, concern over the detrimental effect of fin geometry on boundary layer thickness has led to considerable reluctance to use this type of extended surface in extremely viscous liquids, especially those being cooled.
This paper deals with an industrial application of low fin tubing in asphalt service. Bulk shell-side stream viscosities from hot to cold end ranged from 1.7 to 134 cp with Reynolds numbers from 1370 to 14. As expected, standard correlations were found to overpredict Nusselt number. Nevertheless, the thermal enhancement resulting from the extended surface was sufficient to justify the use of these tubes.
A modified Sieder-Tate correlation is proposed for thermal design. Comparative performance decline curves for plain and fin tubes in this service are presented.